RFR: 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF

[Tejesh R]

In Button ToolTip Mnemonic key string was shown only in Metal Look and Feel, since the feature is implemented in it. In other L&F especially Windows L&F the feature is not available. In order to make it available for other L&F's, the getAcceleratedString method and calculateAcceleratedStringSpace method is Implemented in ToolTipUI class. These methods are used in BasicToolTipUI class which uses the feature and shows/paints the ToolTip String along with the set Mnemonic key. In similar way other L&F which doesn't Inherit BasicToolTipUI can make use of the feature available in ToolTipUI.

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Commit messages:
 - Feature moved to ToolTipUI and updated MetalToolTipUI Accordingly
 - Merge branch 'openjdk:master' into branch_8233477
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - Revert "8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF"
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - 8233477: [Win LAF]The tooltip doesn't display correctly in Win LAF
 - 8236987: Remove call to System.out.println from ImageIcon.loadImage
 - ... and 3 more: https://git.openjdk.java.net/jdk/compare/a7716006...7c46bba4

Changes: https://git.openjdk.java.net/jdk/pull/8496/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8496&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8233477
  Stats: 361 lines in 5 files changed: 272 ins; 76 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8496.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8496/head:pull/8496

PR: https://git.openjdk.java.net/jdk/pull/8496